tolong di jawab ya ...... plisssss

b. (4 - x) (4 - x) = 16 - 4x - 4x - x^2 = 16 - 8x - x^2 = - x^2 - 8x + 16 = - (x^2 + 8x - 16)

c. (x + 1/2) (x + 1/2) = x^2 + 1/2x + 1/2x + 1/4 = x^2 + x + 1/4

f. kurang tau
MAAF KALO SALAH